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doit_the_clown doit_the_clown
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7 years ago
From the graph of apparent magnitude changes of the quasar 3C 279 over 20 years, shown in Figure 17-6 of Comins and Kaufmann, Discovering the Universe, 7th Ed., when did this quasar appear to be at its brightest?

(a)   1937, apparent magnitude +11
(b)   1950, apparent magnitude +17
(c)   It is difficult to obtain this information from this graph because apparent magnitude refers to brightness seen from the Earth, and this can change depending on the distance between source and observer as well as on the intrinsic brightness of the source.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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papachulopapachulo
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7 years ago
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doit_the_clown Author
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7 years ago
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this is exactly what I needed
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